if I were (and I have been! that is how i know) I'd look for some 9 speed ultegra (6500) as a good cost vs performance upgrade. the stuff is rock solid and all you need is the brifters and a 9 speed cassette + chain, and your off!

I have them on 2 of my bikes, both purchased used (one was REALLY trashed) but they take a beating and keep on clicking. One set is on my cyclocross bike and its always getting wet and even hit and a bit muddy.. and its fine. super tough.


here are some with 6 hours left and $15

http://www.ebay.com/itm/LQQK-SHIMANO...8AAOSw4GVYTt2t